Choroid plexus metastasis from papillary thyroid carcinoma is very rare, and this is the first case of intraventricular hemorrhage reported.

No abstract

This report concerns a 64-year-old woman with a lymphoplasmacyte-rich meningioma. Radiographically and macroscopically, the tumor had the appearance of an ordinary meningioma. Components of the meningothelial cells were positively immunostained for epithelial membrane antigen. The results of immunohistochemical assays with the antibodies to surface markers of lymphocytes L26 and UCHL-1 indicated that the lymphoplasmacellular proliferation was not neoplastic but probably represented an immune reaction of the host.

Ion exchange and chelate properties of poly(ethyleneimine) resin (PEI) were studied. Adsorption of neucoccin anions (NC−) (maximum 1.7×10−4 mol/g) was greater than that of Crystal Violet cations (CV+) (maximum 0.17×10−4 mol/g), indicating that PEI is an anion exchanger. CV+ adsorption increased with the addition of sodium polyacrylate due to its bridging action between CV+ ions and PEI. Adsorption of CrO42− was confirmed to be much greater than that of NC− ions amounting to 4×10−3 mol/g at a sufficiently concentrated solution of CrO42−. The acid exchange capacity of PEI was found to be about the same as the maximum amount of adsorption of CrO42−. Kinetics of adsorption of CrO42− by PEI was studied at various temperatures. Adsorption followed a bimolecular reaction. Activation energy of 28.03×103 J/mol obtained is a right order of magnitude as an ion exchange adsorption. Chelating adsorption of Fe3+ and Cu2+ ions by PEI studied, the maximum amounts of adsorption being 3.1×10−3 mol/g and 3.3×10−3 mol/g, respectively. The values are greater than those for other synthetic polyethylene polyamine. PEI can be used as an anion and metallic cation adsorbent.